Every year, SleepingInAirports conducts a survey asking travellers to rate their airport experiences based on the services and facilities available within the terminal, cleanliness, customer service, comfort and their overall airport experience. Looking worldwide, there are a lot of airports that didn’t quite make the grade. Those that top our charts for worst airports in the world collected the most negative feedback from voters over the past year. These airports fall flat in terms of providing any kind of enjoyable overall airport experience. Instead, they’re dirty, uncomfortable, unfriendly and lack the most basic of services and amenities. They elicit passionate critiques from those who visit them, and countless warnings for future travellers to avoid these places at all costs. That said, if you do find yourself at one of the following 10 terminals, bring a serious amount of patience because you’ll most definitely need it!